Knurl Pin Sheered Off

 

After cleaning up my new Universal III I was still having trouble getting the grippers to open at the end of the bed. After hunting around this blog, I discovered a post that indicates that the knurl pin is the problem. You had posted a very helpful diagram! (below)  Anyway, the top is broken off – basically flush, which is why I didn’t see it before. I can’t imagine how this could have happened. Part B seems to be stuck in a pushed-in position. Any thoughts how I can get the knurl pin out? I’m hoping Fritz will have a replacement.

 

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Paul Moxon, Moderator
Admin
3 years ago

Are you not able to remove the cam to shim behind it? Is it worn? Are you running very thick paper? The solution may be to apply metal-faced adhesive tape to the outer edge of the cam. Ensure that the cam follower (bearing) on the bottom of the gripper lever aligns with the opener cam. The gripper lever may still need to be adjusted.

Paul Moxon, Moderator
Admin
3 years ago

Because of the high serial number, this press should have the later gripper bar design found on the SP series. So, before you adjust the pivot screw, confirm that the camshaft (horizon rod below the gripper pins) is inserted into the hole on the cylinder casting end on the operator’s side and that the spring is in place.

Examine the spring (X-7522) on the verticle rod. The top shaft collar may be loose and not in contact with the spring.

The post regarding the gripper lever is applicable to older models such as the No. 3 and 4. See the attached image showing that the Universal gripper level is slightly at an angle to the sideplate.

Paul Moxon, Moderator
Admin
3 years ago

When B is compressed against the block, knurled pin A can be pushed down to lock B. Grippers will then only open when the pedal is pushed down.
To extract the sheared pin, remove the two shoulder screws on the side of the block. Swing the block to the left B, then tap the pin through the bottom of the block. Hold B in so that when after the pin is removed it won’t shoot across the room.

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